Question

can anyone explain me.this?

Answer 1

sure,
you have to scetch 3 graphs
ie
y=x^2
y=8-2x
y=4

$y = {x}^{2}$
is a parabolic graph

$y = 8 - 2x$
is a linear function
if u substitute the value of x u will obtain value of y and hence u plot the graph
$y = 4$
is a linear graph ie constant wrt
ie line parallel tok y axis with value 4